• Series 7600 CWA: Adjustable Counterweighted Heavy-Duty

Backdraft Damper

Series 7600 CWA: Adjustable Counterweighted Heavy-Duty

  • Each blade is fitted with a fixed internal counterweight.
  • Additional fully-adjustable external counterbalance weights are mounted outside the airstream. These can be set to relieve air pressure differentials less than 0.01 in. w.g. (3.0 Pa).
  • Counterweights are provided to accelerate opening of blades, and to allow blades to achieve the full open position at lower pressures and airflow velocities.
  • Tamco heavy-duty backdraft dampers are constructed with robust components to withstand up to 12” w.g. (3.0 kPa) of static pressure and velocities up to 3500 fpm (17.8 m/s).
  • Blades are designed with a rounded head. This reduces pressure loss.
  • The Series 7600 CWA is manufactured with the same dual bearing system used for Tamco’s control dampers, resulting in dependable, consistent, and maintenance-free performance.
  • The sturdy, slip-proof linkage system is located in the frame side.
  • Silicone seals are provided as standard to ensure sealing longevity and remain flexible down to -40° F/C.
  • Tamco Series 7600 CWA is available in two install types: Flanged to Duct or Extended Rear Flange.
  • The Series 7600 CWA can be installed for airflow up, airflow down, or horizontal airflow operation.

Caution: Never use any lubricants, such as grease or silicone, on Tamco dampers.

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Series 7600 CWA Adjustable Counterweighted Heavy-Duty, Backdraft Damper:

  • Ideal for installations requiring a heavy-duty backdraft damper with field-adjustable pressure relief
  • Used to accelerate opening of blades and designed to allow opening at lower pressures and airflow velocities
  • Specifically designed for installations requiring a heavy-duty backdraft damper, subjected to elevated velocities and operating pressures
  • Recommended for use in high-pressure isolation systems, air handling units, gen sets, and fan inlet or fan outlet locations

ET – Elevated Temperature Option:

  • Heavy-duty backdraft dampers are designed for operation in temperatures as high as 300°F (149°C).
  • Bronze-oilite bearings replace Celcon and polycarbonate bearings.

MR – Moisture Resistance Option:

  • All zinc-plated steel hardware is replaced with stainless steel, protecting hardware from rust and corrosion when exposed to high humidity or high moisture environments.

SW – Salt Water Resistance Option:

  • Extruded aluminum frames, blades and hardware are clear anodized to a depth of 0.7 mil. (18 microns). This prevents rusting and pitting when heavy-duty backdraft dampers are exposed to salt spray or high humidity environments.
  • All zinc-plated, steel hardware is replaced wtih stainless steel, protecting hardware from rust and corrosion.
  • All aluminum linkage hardware parts are clear anodized.

Please click the option above that is most applicable to you for more information.

Caution: External counterbalance crankarms and weights are not available in stainless steel and may be subject to rust or corrosion in high moisture or salt spray environments.

SP – Standard profile

  • Manufactured with 4” (101.6 mm) deep frames
  • Manufactured with blades that are a maximum 6” (152.4 mm) deep.

Series 7600 CWA Submittal and Performance Data

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Series 7600 CWA Suggested Specifications

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Tamco Heavy-Duty Backdraft Damper Installation Guidelines

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Heavy-Duty Backdraft Damper Schedule

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